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No. 6D8,383. Patented Aug. 2, |898. B. J. PARKER &. F. G. CROSS. PIPE BENDING MACHINE.

\ (Application med nu. 9, 189s.) (No Model.) 3 Sheets-$het I.

\/A.\ IH-IIIIIIl-IIIIIIIIIIIIll-IIIINIIIIIIIIIIII l "IllIlllllllll-l Il-lll Ill-IIIIIIIIHIIII-IIIIIIIIIIIIIIII No. 608,383. Patented Aug. 2, |898. ,B..1. PARKER & F. a. cnoss.

PIPE BENDING MACHINE.

(Application filed nu. 9, 189s.) (No Model.) 3 Sheets*Sheet 2 @mib/wane@ (no model.)

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` O O I m Y Patented Aug. 2, |898.

PIPE BENDING MACHINE.

(Application led Har. 9, 1898.)

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' suitable d iameter, provided in its periphery- 5o idly supported upon one end of the mandrel likewise provided with semicircular recesses roo UNITED STATES PATENT rEroE.

BARTON J OSEPHUS PARKER ANDFRANK GILES CROSS, OF SAN FRANCISCO, CALIFORNIA; SAID PARKER ASSIGNOR TO GEORGE X. W'ENDLING, OF

SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 608,383, dated August 2, 1898.

Application filed Marcil 9, 1898.

To all whom it may concern.-

Be it known that we, BARTON JOSEPHUS PARKER and FRANK GILEs ORoss, citizens of the United States, residing at San Francisco, in the county of 4San Francisco and State of California, have invented certain new and useful Improvements in Pipe-Bending Machines, of which the following is a specification.

' This invention relates to certain new and useful improvements in machines for beuding pipes, rods, bars, or the like, having -for its object to provide simple and efficient means whereby this may be easilyand quickly accomplished while the pipes or rods are in a cold state; and with this object in View the invention consists in the novel construction and arrangement of the parts hereinafter more particularly referred to.V

In the accompanying drawings, forming a part of this specification and in which' like letters and numerals of reference indicate corresponding parts, Figure 1 is a side elevation of a machine embodying the invention. Figs. 2 and 3 are opposite end views thereof. Fig. 4 is a detail end ViewV of the formingmandrel detached, and Fig. 5 is a detail plan view of the driving mechanism.

Referring more particularly to the drawings, A designates the frame ofthe machine, comprising two separated endl uprights 1 2, supported upon iixed base bars or plates, the upright 1 being stationary with respect to its base, while the upright 2 is pivoted at its lower end to lugs 3 of the base-plate and is adapted to be swung in a vertical plane to the position indicated in dotted lines, Fig. 1,

the purpose of which will be presently de-v scribed.

Journaled at one end in bearings of the upright 1 and at its opposite end resting in the end of an elongated opening of the upright 2 is arhorizontal shaft 4, keyed orotherwise secured, upon which intermediate the uprights 1 2 is a cylindrical mandrel 5 of with a spiral concave groove 6 of any desired pitch and extending, preferably, from one end of the mandrel to the other. Rig- Serial No. 673,212. (No model.)

and projecting therefrom are separated cheekpieces 7, between which is formed a bearing 8, and there' is pivotally supported a camfaced locking-piece 9.

Any suitable means may be employed for imparting rotary movement to the mandrel 5 and its supporting-shaft; but preferably there is mounted upon the end of the shaft 4 a worm-gear 10, intermeshing with which is a worm-wheel12, carried upon a drivingshaft 13, journaled in bearings of the upright 1 and extending at right angles to the shaft 4. Loosely mounted upon the shaft 13 are two band-wheels 14 15, which in practice are driven in opposite directions, and likewise mounted upon the shaft 13, intermediate the band-wheels thereon, is a clutch 1G. This clutch is keyed to the shaft 13 and is adapted to be shifted longitudinally thereon to engage clutches 17 18 of the band-wheels 14 15, respectively, to lock the same to the shaft. As above stated, these band-wheels are driven in lopposite directions, and the direction of rotation of the shaft 13 and mandrel 5 depends accordingly upon which band-wheel is connected to the shaft 13. It is preferred that the mandrel be rotated much faster in one direction than inthe other, and accordingly the wheel 14 is much smaller in diameter than the wheel 15. The purpose of this will presently be explained.

Any convenient means may be employed for shifting the clutch 16 into engagement with either of the clutches 17 1S. Thus, as shown, the clutch 16 is provided in its periphery with an annular channel 19, into which extend at diametrically opposite points studs from a fork 20, carried upon a lever 2'1, which lever is pivoted intermediate its ends upon a bracket 22 and is adapted to be shifted horizontally. The bracket 22 extends from the upright 1 and is provided with a segmental slot 23, through which extends a screw for reception of a clamp-nut 24, by means of which the lever 21 and clutch 16 are locked in any position to which they are shifted.

Formed in the upper ends ofthe uprights 1 2 are semicircular recesses 25, and pivoted to lugs of said uprights are cap-pieces 26,

and adapted to extend across the ends of the uprights to bring their recesses to register with those of the uprights, thereby forming circular openings into which are received the opposite ends of a shaft 27, which extends parallel to the face of the mandrel 5. As a convenient means of securing the free ends of the cap-pieces in position they are provided in said ends with vertical recesses 2S, adapted to receive hinged bolts 2l) of the uprights, adapted to be swung into the recesses and provided with heads or nuts 30, which engage the upper faces of the cap-pieces and hold them in contact with the uprights.

Mounted loosely upon the shaft 27 to rotate and to move longitudinally thereon is a forming-wheel 3l, which extends practically into contact with the mandrel 5 and is provided in its periphery with an annular semicircular groove 32, corresponding to that in the said mandrel.

In operation when the parts are thus constructed and arranged the end of a pipe or rod is passed between the forming-wheel and mandrel to lie in the grooves thereof and is secured upon the bearing S by means of the lock D, as indicated in Fig. it. The clutch 1G is then shifted to connect the band-wheel 15 and shaft 13 together, thereby imparting a relatively slow rotary movement to the mandrel, and by reason of the extreme end of the pipe being secured to the mandrel the pipe is drawn through the groove thereof, into which it is held by the forming-wheel, which wheel presses the pipe into close conformity with the groove, and the pipe being coiled in a spiral acts as a thread and draws the forming-wheel with it, causing` it to move longitudinally of the mandrel. Frein this it will be obvious that the pipe is gradually coiled in the groove of the mandrel and that during the ceiling thereof there is always a constant and uniform pressure upon the pipe just at the point of bending. It will be apparent, teo, that by reason of the rotation of both the mandrel and forming-wheel there is very little friction, and in consequence pipes may be bent with great rapidity and without danger of injury. lVhen the desired alnount of pipe has been coiled upon the mandrel, the rotation of the mandrel is arrested, and the locking devices of the cap-pieces t are released, and the said pieces are swungback upon their pivots, and the shaft 27 and forming-wheel 3l are lifted from the machine. As a convenient means of effecting this an eye 35 .is provided at cach end of the shalt 27, to which is connected the ends of cables S0, passing over pulleys 37, arranged above the machine, and at the ends of the cables are secured counterweights which when the shaft and formingwheel are lifted to the position indicated in dotted lines, Fig. l, serve te maintain them in such position. After the sha ft 27 and its forming-wheel have been removed the upright 2 is swung down upon its pivot to the position indicatedrin dot ted lines, lfig. l, leaving the end of the mandrel and its shaft exposed and easily accessible. The end of the pipe-coil is then released from the clamp 0, after which the band-wheel lt is connected to rotate the shaft 13 and mandrel and the coil of pipe is unscrewed from the mandrel and is removed from the unsupported end thereof. In order that the upright 2 may be raised and lowered with but little effort on the part of the operator, a cable A1.70, passing over an elevated pulley and provided with a counterweight tl, is connected thereto, which countcrweight balances the upright in any position to which it is swung and assists in moving it from one position to another.

rfhe shaft fl may be lcngthened to support any desired number of mandrels, and these mandrels may be all of the same diameter, or they may be of different diameters7 and the shaft 27 may be adapted to receive form ing-wheels of different diameters as the size of the mandrels is changed. lVhcn a tapering mandrel is employed for forming tapert ing coils, the shaft 27 is set so as to be parallel to the face of the mandrel, which may be effected by removing one of the cap-pieees of the uprights and inserting suitable bearing-blocks for supporting one end of the said shaft in proper position.

lVithout limiting ourselves to the exact eonstruction and arrangement of parts shown and described, since it will be obvious that various changes in such construction and arrangement may be made without departingr from the spirit or scope of the invention and some features thereof used without others,

What we claim isl. In a ceiling-machine, the combination of a mandrel provided with a spiral groove, means for rotating the mandrel, and a grooved forming-wheel normally free to move longi tudinally relative to the mandrel parallel to the face thereof, substantially as described.

2. In a ceiling-machine, the combination of a mandrel provided with a spiral groove, means for rotating the mandrel, a shaft arranged parallel to the face of the mandrel, and a grooved forming-wheel upon said shaft normally free to move upon the shaft longitudinally relative to the mandrel, substantially as described.

3. In a ceiling-machine, the combination of the frame, a mandrel provided with a spiral groove, means for rotating the mandrel, a grooved forming-wheel adapted to move longitudinally of the mandrel and a support for the forming-wheel. movable with relation to the frame to carry the forming-wheel into and out of operative position, substantially de scribed.

it. In a machine for ceiling pipe, the com' bination of a mandrel provided with a spiral groove, means for rotating the mandrel in opn posite directions, reversing devices controlling said means and a grooved forming-wheel adapted to move longitinlinally of and parallel to the face of the mand rel, substantially as described.

IOO

IIO

5. In a (soiling-machine, the combination of a mandrel provided With a spiral groove, a stationary support for one end of the mandrel, a removable support for the opposite' end thereof, means for rotating the mandrel, and a grooved forming-Wheel normally free to move longitudinally relative to the mandrel, substantially as described.

6. In a eoiling-maehine, the combination of a mandrel having` a Vspiral groove and mounted to rotate in fixed bearings, means for rotating the mandrel, a grooved forming,` Wheel, and a shaft journaled in fixed bearings upon BARTON JOSEPIIUS PARKER.v FRANK GILES CROSS,

IVitnesses:

A. MCCABE, GEORGE F. I-IATToN.- 

